A sterile implantable artificial substitute for a shoulder joint designed to replace both articulating surfaces of the damaged (e.g., fractured) and/or degenerative (e.g., arthritic) joint. It includes glenoid and humeral (head and stem) components typically with parts made of metal and polyethylene (PE). Fixation devices for implantation (e.g., screws) may be included and implantation may be performed with or without bone cement.